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Renesas 54FCT245TDB
- Part No.:
- 54FCT245TDB
- Manufacturer:
- Renesas
- Package:
- 20-CDIP (0.300", 7.62mm)
- Datasheet:
-
54FCT245TDB.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,335
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Product details
Overview
54FCT245TDB from Renesas Electronics (formerly IDT) is a military-grade octal bidirectional transceiver in CERDIP package, designed for asynchronous two-way data bus communication between A and B ports. It features TTL-compatible I/O (VOH = 3.3V typ., VOL = 0.3V typ.), high-drive outputs (–15mA IOH, 64mA IOL), and operates across –55°C to +125°C at 5.0V ±10%. Used in ruggedized avionics backplanes and defense system interconnects.
For engineers reviewing the 54FCT245TDB datasheet, 54FCT245TDB pinout, 54FCT245TDB application, or 54FCT245TDB equivalent, key selection criteria include MIL-STD-883 Class B compliance, bidirectional direction control via T/R input, OE-active-low 3-state enable, and CERDIP-20 mechanical robustness for shock/vibration environments.
Technical Context
The 54FCT245TDB implements dual-rail CMOS logic with true TTL input thresholds (VIH = 2V min, VIL = 0.8V max) and rail-to-rail output swing. Its direction control is fully asynchronous: T/R high enables A→B flow; T/R low enables B→A flow. Output enable (OE) is active-low and overrides direction control to force high-Z on both ports.
Propagation delay is guaranteed ≤7.5 ns (tPLH/tPHL, CL = 50pF, RL = 500Ω), with output enable/disable times ≤10 ns (tPZH/tPHZ). Power-off disable capability allows live insertion into powered systems without bus contention or latch-up risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5.0V ±10% - supports legacy 5V military power rails with margin for transient variation |
| Operating Temp | –55°C to +125°C - qualified per MIL-STD-883 Class B for airborne and ground vehicle systems |
| IOH / IOL | –15mA / +64mA - drives heavy capacitive loads (e.g., long backplane traces) without signal degradation |
| tPLH / tPHL | ≤7.5 ns - ensures sub-10 ns latency for real-time bus arbitration in deterministic systems |
| Input Leakage | ≤1 µA max - prevents false triggering in high-impedance monitoring or low-power standby modes |
| VIH / VIL | 2.0V min / 0.8V max - guarantees interoperability with standard TTL and LVTTL logic families |
| ICC Quiescent | ≤1 mA - minimizes static power draw in always-on subsystems such as mission-critical controllers |
Pinout & Package
54FCT245TDB is housed in a 20-pin CERDIP (Ceramic Dual In-line Package) with hermetic sealing, lead spacing of 0.300", and military-grade thermal and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 7, 9, 6 | A0–A7 Inputs/Outputs | Side A bidirectional data terminals; high-Z when OE = H or during power-down |
| 11, 12, 13, 14, 15, 17, 18, 19 | B0–B7 Inputs/Outputs | Side B bidirectional data terminals; direction determined by T/R state |
| 10 | OE | Active-low output enable; forces all A/B pins to high-Z regardless of T/R state |
| 20 | T/R | Transmit/Receive control; high = A→B, low = B→A - asynchronous, no clock required |
| 8 | GND | Digital ground reference for all I/O and internal logic |
| 16 | VCC | Positive supply terminal; decoupling capacitor required per MIL-STD-1399 guidance |
Key Features
| Feature | Design Value |
|---|---|
| MIL-STD-883 Class B qualification | Validated for shock, vibration, temperature cycling, and burn-in per military screening requirements |
| Live-insertion support | Power-off disable ensures outputs remain high-Z even when VCC = 0V, preventing bus contention |
| True TTL input compatibility | VIH = 2.0V min and VIL = 0.8V max eliminate need for level-shifting in mixed-logic systems |
| High noise immunity | 200 mV input hysteresis reduces susceptibility to EMI-induced glitches on control lines |
| JEDEC Std. 18 compliance | Guarantees interoperability with industry-standard 5V logic families in multi-vendor designs |
Applications
| Avionics Data Bus Interface | Tactical Vehicle Control Backplane |
|---|---|
Use Scenario: Interfacing dissimilar 5V data buses between flight control computers and sensor acquisition modules in fighter aircraft. IC Role / Device Role / Timing Role: Bidirectional level-consistent transceiver enabling real-time A→B command transmission and B→A telemetry return over shared MIL-STD-1553 auxiliary links. Use Value: Eliminates need for discrete buffers or translators while maintaining <7.5 ns propagation delay for closed-loop timing integrity. | Use Scenario: Isolating and routing CAN and discrete I/O signals between engine control units and dashboard displays in armored vehicles. IC Role / Device Role / Timing Role: Direction-controlled bus bridge synchronizing legacy 5V subsystems without introducing clock-domain crossing latency. Use Value: CERDIP packaging withstands 20g vibration and –55°C cold-soak, ensuring uptime in extreme operational environments. |
| Secure Communications Chassis | Radar Signal Processing Subrack |
Use Scenario: Enabling secure firmware updates between encrypted boot ROM and field-programmable logic in COMSEC hardware. IC Role / Device Role / Timing Role: Controlled-data-path transceiver allowing authenticated host access to configuration memory while blocking unauthorized reads. Use Value: OE and T/R inputs permit dynamic reconfiguration under cryptographic supervision without bus lockup. | Use Scenario: Buffering high-speed ADC sample streams between analog front-end and FPGA-based digital beamformer in ground-based radar. IC Role / Device Role / Timing Role: Low-skew, high-drive octal transceiver preserving signal edge fidelity across 20 cm backplane runs. Use Value: 64mA IOL drives 50 pF + 50 Ω loads with <0.55V VOL, minimizing jitter accumulation in time-critical sampling paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bidirectional transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 54ACT245 | AC-family; higher speed (tPLH ≤ 5.5 ns), but lower drive (–24mA/24mA) and no MIL-STD-883 Class B screening | Suitable for commercial aerospace test equipment where speed > ruggedness; not qualified for deployed platforms | Select only if full military qualification is unnecessary and propagation delay must be <6 ns |
| SNJ54LS245W | LS-TTL family; slower (tPLH ≤ 25 ns), higher ICC (25 mA), and no live-insertion capability | Legacy replacement in refurbished systems where footprint matches but performance margins are relaxed | Choose only for backward compatibility in non-safety-critical maintenance spares |
Compared with 54FCT245TDB, 54ACT245 offers faster switching but lacks hermetic packaging and MIL-STD-883 validation, while SNJ54LS245W provides pin-compatible legacy support at significantly higher power and latency-making 54FCT245TDB the optimal choice for new ruggedized designs requiring balance of speed, drive, and qualification.
Availability
54FCT245TDB is available at Aetrix Electronics and suitable for avionics data bus interface, tactical vehicle control backplane, and secure communications chassis requiring stable component supply under extended temperature and shock conditions.
Supply support for 54FCT245TDB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, infrastructure, and IoT applications.
The 54FCT245TDB belongs to Renesas' legacy IDT military logic product line, engineered specifically for high-reliability, wide-temperature-range digital interconnect in defense and aerospace systems.
FAQ
What temperature range does the 54FCT245TDB support?
The 54FCT245TDB is rated for operation from –55°C to +125°C and is screened per MIL-STD-883 Class B. This makes it suitable for deployment in uncontrolled environmental enclosures such as aircraft bays, tank engine compartments, and satellite payload sections where ambient extremes exceed commercial grade limits. Its CERDIP package maintains mechanical stability across this full range.
Is the 54FCT245TDB pin-compatible with standard 74-series transceivers?
Yes, the 54FCT245TDB uses the industry-standard 20-pin DIP pinout defined in JEDEC MS-012, matching 74F245, 74ACT245, and SNJ54LS245W. Pin functions (A0–A7, B0–B7, OE, T/R, VCC, GND) are identical, enabling drop-in replacement in existing layouts-provided voltage and timing margins accommodate FCT-family characteristics like higher drive and faster edges.
Does the 54FCT245TDB support live insertion into a powered backplane?
Yes, the 54FCT245TDB features power-off disable: when VCC = 0V, all I/O pins enter high-impedance state regardless of OE or T/R logic levels. This prevents bus contention, signal corruption, or damage during hot-swap operations in modular avionics or radar subracks-verified per MIL-STD-883 method 3015.3.
What is the maximum capacitive load the 54FCT245TDB can drive reliably?
The 54FCT245TDB is characterized for CL = 50 pF in switching tests and guarantees VOL ≤ 0.55V at IOL = 48mA (military) and 64mA (industrial). With its 64mA sink capability and low output impedance (<5 Ω typical), it reliably drives ≥75 pF loads-including PCB trace capacitance, connector parasitics, and input capacitance of downstream receivers-while maintaining signal integrity at full speed.
How does the T/R control input function in the 54FCT245TDB?
The T/R input is an asynchronous, level-sensitive control: when T/R = HIGH, data flows from A ports to B ports; when T/R = LOW, data flows from B ports to A ports. This direction change occurs with no clock dependency or setup/hold timing constraints-enabling real-time bus arbitration in deterministic systems like flight control networks where latency predictability is critical.
54FCT245TDB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 54FCT
- Package/Case:
- 20-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 48mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-CDIP
54FCT245TDB FAQ
1.How can I place an order for 54FCT245TDB through Aetrix?
Please submit a Request for Quotation (RFQ) for 54FCT245TDB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 54FCT245TDB reliable?
The price and inventory of 54FCT245TDB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 54FCT245TDB is usually 5 days.
3.What payment methods are accepted for 54FCT245TDB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 54FCT245TDB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 54FCT245TDB?
54FCT245TDB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 54FCT245TDB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 54FCT245TDB?
For technical support, including 54FCT245TDB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 54FCT245TDB requirements.
6.How does Aetrix verify that 54FCT245TDB is sourced from the original manufacturer or authorized distributors?
All 54FCT245TDB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 54FCT245TDB meets industry standards.
7.What is the process for return or replacement of 54FCT245TDB?
All 54FCT245TDB units undergo pre-shipment inspection (PSI). If there is an issue with 54FCT245TDB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 54FCT245TDB part is unused and in its original packaging.
Return procedure for 54FCT245TDB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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